I will try and make this as straight forward as I can.
Firstly I desire a PH of between 6 and 6.5
I am getting a 450L tank soon, in order to fill it I'm going to use tap water from my home (hose) which has a PH of 8+ also hard water. Water changes are going to be made with water that has a PH between 6 and 6.5 (rain water also very soft.). I understand that driftwood works are a PH buffer. I have some large pieces of driftwood which I have soaked in my tap water, which I now realise was a mistake (I think?). My original plan was to fill the tank with tap water, plant the plants, and do water changes as per usual and the PH will drop as I would be replacing the water with more acidic water. Then once the desired PH was achieved I was going to add fish. If I understand this correctly because I have soaked my driftwood (to get it to sink) in a PH of 8+ it will act as a buffer and hold the PH at 8+.
If the above is correct. I need to find a way to set the buffer of the driftwood to a PH between 6 and 6.5. My idea to achieve this would be to use a product like "PH down" or "proper PH 6.5" I understand that "proper PH 6.5" has a buffering component in it. Would I be better off to use "PH down" until the desired PH is achieved? Would that cause my driftwood to be "overwritten" with the new buffer value of 6-6.5?
Answer to my questions would be greatly appreciated.
Cheers,
Scott